package org.apache.ddlutils.io;

        /*
         * Licensed to the Apache Software Foundation (ASF) under one
         * or more contributor license agreements.  See the NOTICE file
         * distributed with this work for additional information
         * regarding copyright ownership.  The ASF licenses this file
         * to you under the Apache License, Version 2.0 (the
         * "License"); you may not use this file except in compliance
         * with the License.  You may obtain a copy of the License at
         *
         *   http://www.apache.org/licenses/LICENSE-2.0
         *
         * Unless required by applicable law or agreed to in writing,
         * software distributed under the License is distributed on an
         * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
         * KIND, either express or implied.  See the License for the
         * specific language governing permissions and limitations
         * under the License.
         */

import java.util.Iterator;
import java.util.List;

/**
 * Base class providing helper functions for writing model elements to XML.
 */
public abstract class ModelXmlWriter {
    protected void writeText(DataWriter writer, String value, boolean isBase64Encoded) {
        if (isBase64Encoded) {
            writer.writeAttribute(null, "base64", "true");
            writer.writeCharacters(value);
        } else {
            List cutPoints = XMLUtils.findCDataCutPoints(value);

            // if the content contains special characters, we have to apply base64 encoding to it
            if (cutPoints.isEmpty()) {
                writer.writeCharacters(value);
            } else {
                int lastPos = 0;

                for (Iterator cutPointIt = cutPoints.iterator(); cutPointIt.hasNext(); ) {
                    int curPos = ((Integer) cutPointIt.next()).intValue();

                    writer.writeCData(value.substring(lastPos, curPos));
                    lastPos = curPos;
                }
                if (lastPos < value.length()) {
                    writer.writeCData(value.substring(lastPos));
                }
            }
        }
    }
}
